高强度板U形件冲压成形的回弹仿真研究

Forging & Stamping Technology(2008)

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Abstract
回弹是板料冲压成形过程中一种常见、但又很难解决的现象,在U形件尤其是高强度板U形件的成形中回弹更加明显。分析了回弹机理以及U形件的成形特点,提出采用两次弯曲的办法来控制高强度板U形截面纵梁的回弹,利用有限元分析软件DYNAFORM进行了数值模拟,并且对两次弯曲法进行了实验验证。实验结果表明:模拟正确,采用两次弯曲控制纵梁回弹的工艺方法合理。采用此方法使纵梁的回弹控制在零件的公差范围±1.5mm以内,生产出符合图纸要求的零件。
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Key words
spring-back,U-shape part,carling,high strength sheet metal
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